by Kastro
Paper/Archive/CVE-2026-54378

CVE-2026-54378

Shenzhen Shine Industrial Co., Ltd. VitaFit — VitaFit Cloud API Broken Access Control via S3 Token Endpoint

CVSS 9.6
critical.is priorityof 100
29
CVSS 9.6 (CNA)9.6 / 10 × 3028.8Not in CISA KEV+300.0No EPSS score.000 × 200.0No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

VitaFit cloud API before 2026-10-30 contained a broken access control vulnerability that allows any authenticated user to obtain temporary AWS credentials by calling the POST /front/user/s3/token/ endpoint. Attackers can use these improperly scoped credentials to list the shared storage bucket and read or overwrite other users' stored files, enabling unauthorized cross-user data access and manipulation.

Affected

ProductAffectedFixed inSource
VitaFit< 2026-10-302026-10-30CNA

Scores by source

VulnCheck (CNA)9.6CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N

References

exploitgithub.com/je-lv/vitafit-security-researchrefplay.google.com/store/apps/details?id=com.vt.vitafitwriteupvulncheck.com/advisories/vitafit-cloud-api-broken-access-control-via-s3-token-endpoint